CVE-2021-39140XStream is a simple library to serialize objects to XML and back again.
Updated under an hour ago ()
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It affects xstream and 14 other products. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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XStream is a simple library to serialize objects to XML and back again. In affected versions this vulnerability may allow a remote attacker to allocate 100% CPU time on the target system depending on CPU type or parallel execution of such a payload resulting in a denial of service only by manipulating the processed input stream. No user is affected, who followed the recommendation to setup XStream's security framework with a whitelist limited to the minimal required types. XStream 1.4.18 uses no longer a blacklist by default, since it cannot be secured for general purpose.
- CVSS
- 6.3 MEDIUM (v3.1, NVD)CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:N/I:N/A:H
- Weakness (CWE)
- CWE-502, CWE-835
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Not given
- NVD analysis
- Analyzed
- Record last updated
- Oct 7, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
xstream xstream xstream:xstream | before 1.4.18 | NVD |
debian debian_linux debian:debian_linux | 9.0; 10.0; 11.0 | NVD |
fedoraproject fedora fedoraproject:fedora | 33; 34; 35 | NVD |
netapp snapmanager netapp:snapmanager | all versions; all versions | NVD |
oracle business_activity_monitoring oracle:business_activity_monitoring | 12.2.1.4.0 | NVD |
oracle commerce_guided_search oracle:commerce_guided_search | 11.3.2 | NVD |
oracle communications_billing_and_revenue_management_elastic_charging_engine oracle:communications_billing_and_revenue_management_elastic_charging_engine | 11.3; 12.0 | NVD |
oracle communications_cloud_native_core_automated_test_suite oracle:communications_cloud_native_core_automated_test_suite | 1.9.0 | NVD |
oracle communications_cloud_native_core_binding_support_function oracle:communications_cloud_native_core_binding_support_function | 1.10.0 | NVD |
oracle communications_cloud_native_core_policy oracle:communications_cloud_native_core_policy | 1.14.0 | NVD |
oracle communications_unified_inventory_management oracle:communications_unified_inventory_management | 7.3.4; 7.3.5; 7.4.0; 7.4.1; 7.4.2 | NVD |
oracle retail_xstore_point_of_service oracle:retail_xstore_point_of_service | 16.0.6; 17.0.4; 18.0.3; 19.0.2; 20.0.1 | NVD |
oracle utilities_framework oracle:utilities_framework | 4.2.0.2.0; 4.2.0.3.0; 4.3.0.1.0; 4.3.0.6.0; 4.4.0.0.0; 4.4.0.2.0; 4.4.0.3.0 | NVD |
oracle utilities_testing_accelerator oracle:utilities_testing_accelerator | 6.0.0.1.1 | NVD |
oracle webcenter_portal oracle:webcenter_portal | 12.2.1.3.0; 12.2.1.4.0 | NVD |
References
- https://github.com/x-stream/xstream/security/advisories/GHSA-6wf9-jmg9-vxccthird-party-advisory
- https://lists.debian.org/debian-lts-announce/2021/09/msg00017.htmlmailing-list, third-party-advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/22KVR6B5IZP3BGQ3HPWIO2FWWCKT3DHP/mailing-list
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PVPHZA7VW2RRSDCOIPP2W6O5ND254TU7/mailing-list
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/QGXIU3YDPG6OGTDHMBLAFN7BPBERXREB/mailing-list
- https://security.netapp.com/advisory/ntap-20210923-0003/third-party-advisory
- https://www.debian.org/security/2021/dsa-5004third-party-advisory
- https://www.oracle.com/security-alerts/cpuapr2022.htmlpatch, third-party-advisory
- https://www.oracle.com/security-alerts/cpujan2022.htmlpatch, third-party-advisory
- https://www.oracle.com/security-alerts/cpujul2022.htmlpatch, third-party-advisory
- https://x-stream.github.io/CVE-2021-39140.htmlexploit, third-party-advisory
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.